SQL data types define what kind of data can be stored in a column.
Choosing the correct data type is very important for accuracy and performance.
Each column in a table must have a data type.
Numeric data types are used to store numbers.
They are commonly used for ids, quantity, age, and price values.
Examples include INT, DECIMAL, and FLOAT.
String data types are used to store text information.
They are used for names, emails, addresses, and descriptions.
Common string data types include VARCHAR and TEXT.
Date and time data types are used to store time-related information.
They help track record creation time and updates.
Common types include DATE, TIME, and DATETIME.
Using correct data types reduces storage usage and improves performance.
Proper data type selection makes databases efficient and reliable.
This is a key skill for backend developers.